Demi Lovato wears this Studded shoulder leather jacket

Unfortunately I couldn't find the exact jacket, but I found this similar one this Topshop Studded Faux Leather Biker Jacket you can buy it HERE for $131
Another similar one is this Glamorous Faux Leather Studded Biker Jacket from ASOS which has spikes on the shoulder instead. You can buy it HERE for $93.25